<template>
  <div class="list" ref="wrapper">
    <div>
       <div class="area">
            <div class="title border-topbottom">当前城市</div>
            <div class="button-list">
              <div class="button-wrapper">
                <div class="button">北京</div>
              </div>
            </div>
       </div>
       <div class="area">
        <div class="title border-topbottom">热门城市</div>
        <div class="button-list">
          <div class="button-wrapper"
               v-for="item
                          of
                          hot"
               :key="item.id">
            <div class="button" >{{item.name}}</div>
          </div>
        </div>
       </div>
       <div class="area" v-for="(item, key)
                                of
                                cities"
                                :key="key"
                                :ref="key"
       >
         <div class="title border-topbottom">{{key}}</div>
         <div class="item-list">
           <div
             class="item border-bottom"
             v-for="innerItem
                   of
                   item"
             :key="innerItem.id"
           >
             {{innerItem.name}}
           </div>
         </div>
       </div>
    </div>
  </div>
</template>
<script>
import Bscroll from 'better-scroll'
export default{
  name: 'CityList',
  props: {
    hot: Array,
    cities: Object,
    letter: String
  },
  mounted () {
    this.scroll = new Bscroll(this.$refs.wrapper)
  },
  watch: {
    letter () {
      if (this.letter) {
        const element = this.$refs[this.letter][0]
        this.scroll.scrollToElement(element)
      }
    }
  }
}
</script>
<style lang="stylus" scoped>
    @import '~styles/varibles.styl'
    .border-topbottom
      &:before
        border-color: #ccc
      &:after
        border-color:#ccc
    .border-bottom
      &:before
        border-color: #ccc
    .list
      position: absolute
      overflow :hidden
      top:1.68rem
      left:0
      right:0
      bottom:0
      .title
        line-height: .54rem
        background :#eee
        padding-left :.2rem
        color:#666
        font-size :.26rem
      .button-list
        overflow:hidden
        padding :.1rem .6rem .1rem .1rem
        .button-wrapper
          float: left
          width:33.33%
          .button
              margin:.1rem
              padding :.1rem  0
              text-align:center
              border :.02rem solid #ccc
              border-radius :.06rem
      .item-list
          .item
              line-height :.76rem
              padding-left :.2rem
</style>
